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为一种直接检测弯曲曲率的光强调制型光纤曲率传感器—它采用弯曲增敏技术提高光纤对弯曲的灵敏度,能区分正向弯曲和负向弯曲,具有线性范围宽、成本低和适合薄结构的埋入式检测等优点建立了数学模型。基于这个模型,讨论了敏感区的光强的调制原理,推导出了光功率损耗与光纤弯曲半径、敏感区几何参数的关系,并通过实验验证了理论分析的有效性,为传感器结构的优化提供了定量依据。
Is a light intensity modulated fiber optic curvature sensor that directly detects the curvature of a bend - it uses bend sensitization to increase the sensitivity of the fiber to bending, distinguishing between positive and negative bends, with a wide linear range, low cost and suitability for thin structures Embedded detection and other advantages of establishing a mathematical model. Based on this model, the modulation principle of the light intensity in the sensitive area is discussed. The relationship between the optical power loss and the bending radius of the fiber and the geometrical parameters of the sensitive area is deduced. The validity of the theoretical analysis is verified by experiment, which provides the optimization of the sensor structure The quantitative basis.